boolean bd_creatures_start_backwards; // BD creatures start moving in opposite direction
boolean bd_creatures_turn_on_hatching;// BD creatures change direction after hatching
int bd_creatures_auto_turn_delay; // BD creatures change direction after delay (in seconds)
+ int bd_gravity_direction; // BD engine initial gravity direction
+ boolean bd_gravity_switch_active; // BD engine gravity switch starts in active state
+ int bd_gravity_switch_delay; // BD engine gravity change delay for switch (in seconds)
boolean em_slippery_gems; // EM style "gems slip from wall" behaviour
boolean em_explodes_by_fire; // EM style chain explosion behaviour